Nowski



A. POGONOWSKL HORN FOR YALKlNG MACHINES. APPLICATiON HLED DEC-2?. my.

Patented Sept. 2, 1919.

unxnnnnnioeouowsk'r, osmwicx, um sinner; new seam wanes, nusrmrn,nssrenon r numonnnn s rr rn LIMITED, or srmmz rmw WALES; nus'rmrn, noouremr.

Toallwli'omitmay owering.

Be it known that I, ALEX.ANDE R' POGO- v uowsxr, a, subject of the Kingof Great Britain, residin at Lulomar, Oarrington Road, Randwic nearSydney, in the State of New South Wales, and Commonwealth of Australia,have invented-a new and useful Improved Horn for Talking-Machines,

Especially Ca'binet Talking-Machines, of

whlch the following is a specification.

This invention refers to those horns of talking machines which aregenerally inclosed in cabinet work and from which issue the soundsproduced by the hidden mechanism of such machines and it relates to thepeculiar construction of horn whereby a clearer, more sonorous and moregenerally effective enunciationof the sound produce ing is obtained. v

4 This improved horn for talking machines especiall cabinet talkingmachines is of rectangu ar cross section,- though any section in'shapeapproximating rectangular might more or less eflicientlyserve. Two ofthe walls (preferably-theside walls) of this rectangular sectionopposite to one another have a very gradual or fine taper and the othertwo adJoining walls (preferably the top and bottom walls) have a largeror blunter taper both tapers terminating where all the walls widen outto form a flaring exitor mouth. The two walls which have Y 'the lessertaper (thepreferential side walls) are straight or flat but the edges ofthese walls are curved to adapt them. to the fitting thereto of, theother walls (or preferential top and bottom walls) which are waved orproducing'deviceand its mouth whichup-- turn very. gradually tapers toits connectionjat the in device fiat though two or three,- undulationsin two opposite of the horn walls very effecorifiee from the soundproductively carry out theintent and object of this invention 0110'or-more than two or three such undulations may more orless effectivelysimilarly functioni' And though compareiiveiylonz emma-water gy fii9li'hs li9ih p s m i mn t- Patented Sept. 2,1919. Application u e December21,1917.- Serial 110.8,027. I

satisfactory utilized.

But in order yet Sh r s waits mi htifbe,

that this inventioumay easily 'carried into practical, effect theiatpresent best known construction of this-im- The horn is made of sidewalls 5 whose edges'are curved as at 4. The top and bot machinesespecially 3 a perspective view of thesame complete' Figures 1 and-:2are .tom walls 6v are waved or have undulations corresponding to saidcurves of the side wallet and the whole makes-up into 'a peculiarlytapered vboxing 5, as phrticularly shown in Fig.- 3, having undulatr'ing to. and bottom walls and reaching from the in st 7 (where it isfixed by flange 8 to the flared mouth or outlet 9 where it isappropriately fixed tov the cabinet'work. The Waves 'orundulations hetop wall as commencing at point a'ofthe all the walls widen out toformthe flared! ,exit or mouth. 9 and in; the "bottom 'wall" therespective corres ndilkg hills and hole;

lows aremarked a; ,-0 and c The curves of the undulations-shown i'nfithe drawing are shown somewhat slightly exaggeratedas to height anddepth butthese 7 approximate sufficiently to practical require.-

. ments to enable. one skilled in, the art 1w 1 which this inventionappertains to decidewhat undulations in "the walls willjserve hisdesired object in regardto sonority and enunciation; It will-be observedthatleach= rlse in 'one"iif the undulating wallsisai't ranged opposite acorresponding rise in the opposite wall but that said rise in the firstwall terminates short of" the line' of the falls i in the second wall,so thatthe. space through i the center of the horn is left clear aI LdFu.0bstructed.-

. What I claim, and diatomby 1k ,e

..tersf Patent of .the' United =S tates, is

a hers.

p 151. the base board of the-talkingmeehanism) to j described,approximately rectangular in cross section throughout its length, havingopposite vertical fiat divergent side walls and top and bottom Wallseach of which is provided with a 'series of undulations, the horn beingtapered toward the exit end, the edges of the side walls being curved,and the undulations of the top and bottom Walls conforming to said sidewall curved edges, each Ilse in one unduletory wall being opposite acorrespondmg 156 in the opposite undulatory wall the'bottonos of theundulations on the. lower Wall of the horn being in a, horizontal planeand the flared end of the horn being in a vertical plane.

.In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ALEXANDER POGONOWSKI. Witnesses:

PERCY N EWELL,

H. O. CAMPBELL

